It happens ever so often. A shooting by one individual in a public area. Schools have been in the news that way.
Recently it happened at an Amish School in Pennsylvania.
6 people are dead.
So why is there no better/stricter/tighter Gun Control in the USA?
It is mostly because of the powerful Gun lobby.
From a cultural standpoint this is to be explained using two of Hofstede´s cultural dimensions: Individualism and Masculinity. Respective scores of the USA: 91 & 62